﻿<p><em>IfcMaterialConstituent</em> is a single and identifiable part of an element which is constructed of a number of part (one or more) each having an individual material. The association of the material constituent to the part is provided by a keyword as value of the <em>Name</em> attribute. In order to identify and distinguish the part of the shape representation to which the material constituent applies the <em>IfcProductDefinitionShape</em> of the element has to include instances of <em>IfcShapeAspect</em>, using the same keyword for their <em>Name</em> attribute. </p>

<blockquote class="note">NOTE&nbsp; See the "Material Use Definition" at the individual element to which an <em>IfcMaterialConstituentSet</em> may apply for a required or recommended definition of such keywords as value for <em>IfcMaterialConstituent.Name</em>.</blockquote>

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HISTORY New entity in IFC4
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